1371281 has 4 divisors (see below), whose sum is σ = 1374132. Its totient is φ = 1368432.

The previous prime is 1371263. The next prime is 1371301. The reversal of 1371281 is 1821731.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 410881 + 960400 = 641^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1371281 - 2⁶ = 1371217 is a prime.

It is a super-2 number, since 2×1371281² = 3760823161922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1371581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506 + ... + 1731.

It is an arithmetic number, because the mean of its divisors is an integer number (343533).

2^1371281 is an apocalyptic number.

It is an amenable number.

1371281 is a deficient number, since it is larger than the sum of its proper divisors (2851).

1371281 is an equidigital number, since it uses as much as digits as its factorization.

1371281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850.

The product of its digits is 336, while the sum is 23.

The square root of 1371281 is about 1171.0170792947. The cubic root of 1371281 is about 111.0986596788.

The spelling of 1371281 in words is "one million, three hundred seventy-one thousand, two hundred eighty-one".